package com.aqie.easy.tree;

import com.aqie.easy.structure.TreeNode;

/**
 *  617. 合并二叉树
 */
public class MergeTrees {
    public TreeNode mergeTrees(TreeNode t1, TreeNode t2) {
        if (t1 == null) return t2;
        if (t2 == null) return t1;
        t1.val += t2.val;
        t1.left = mergeTrees(t1.left, t2.left);
        t1.right = mergeTrees(t1.right, t2.right);
        return t1;
    }
}
